German automakers use highly advanced, computer-controlled AWD (All-Wheel Drive) systems, such as BMW xDrive, Mercedes-Benz 4MATIC, and Audi quattro. A dedicated warning system will trigger a light or message on the vehicle's dashboard if a drive system malfunction occurs.
Your AWD or 4WD (4-Wheel Drive) warning light is on because your vehicle's computer has detected an issue in the wheel drive system. This could be triggered by a temporary glitch, such as a brief electrical signal interruption, or by a component failure, such as a defective sensor, faulty wiring or connector, a stuck 4WD actuator, or a problem with the transfer case. Sometimes the light appears simply because the 4WD system didn't complete a mode shift properly, especially if you switched between 2WD and 4WD while the vehicle was moving too fast. Temporary faults will automatically reset when the vehicle is turned off for a brief period. If the warning light returns and stays on, take your vehicle to a repair shop for a diagnostic scan to identify and address the exact fault.
The technicians at Stadium Auto Service in Ann Arbor are experts in repairing and servicing AWD and 4WD systems on German vehicles.